Course 5 week 1 assignment 1(exercise 2-rnn_forward)

Hello, I,m Hananeh Ali pour. I encountered an error, but I am sure that I entered the codes of the second exercise correctly.

a_next= a0 (invalid syntax)

Please help me to solve this problem.

Lab ID : vbojmirliqhk

Typically, a SyntaxError occurs on the line preceding the line mentioned in the error message. So, inspect the line immediately before a_next = a0. Make sure that all parentheses, brackets, and quotation marks are correctly closed and balanced.

Thank you very much, problem solved.